Device for introducing atomized liquid into gas under pressure



- H. J. GOODYER DEVICE FOR INTRODUCING ATOMIZED LIQUID INTO GAS UNDER PRESSURE Filed Jan. 21', 1950 Patented ct. 7, 1952 DEVICE Fon IN'rRoDuoI-NG AT'oMIzED LIQUIDINro'GAs UNDER PRESSURE Harold. .L Goodyem Chicago,` I1ll-., assignor, by

mesne assignments to Hlls-McCanna. Company, Chicago, Il1.,.a corporation of Illinois 1 'Fl-1e present invention relates generally' to devices for introducing a liquid` in atomized `or sprayform intola stream fof" gas under pressure.

Moreparticularly the inventionrelates to `that type -of device `which is designed-primarily tofbe interposed in a pipe system between acornpres-HA sor or other source -of air'under Apressu're'land' al pneumatic tool, serves to `introduce into the air under pressurelin trans-it throughthe jp'ipe'systern atomized* oil for the purpose -of 'lubricating the tool, ands as -i'ts principal parts- `or components comprises: ('lf) a housing' which is adaptedlto have the==ai`runder-pressure flow through it and has `iri-l'et and outlet -ducts'wi'th internal screw threads 'forconnection to Ycertain pipes 'of the pipe system; (2) a `sump-like receptacle which is `connected" to, -`and depends from, the housing and is-adapted "tol contain `a body -or column of oil; (`3-)` a'by-g-pass `which is formed in "the `hous ing; extends 'between the inlet and outlet ducts and includes -a Venturi tube; and `(d)v fav suctiontube which leads Afrom the Venturi tube tothe lower portion of the receptacle 'and serves, response to `theaspiratirlg eirect of the Venturi tube during yuse oroperation `of the device, to supply oil droplet `forni for admixture 'with the stream-vof air under pressure `flowing through theVenturi tube.

One object of"` the* invention 'istu` provide` a deviceffof this type which is an improvement upon, and v-h'zaisacertafin inherent advantages Hover, previously' designed devices for the same pur pose and is characterized by thel fact-that! it is extremely "eiilcfent in operation-'embodies a 4novel arrangement of `parts and essentially s'i'rmzilel indesign or construction.

`Another object of the' invention is'touprovide an atomizer variety devicefo'ftheftyper'underfoon-- sideration in which the housing `is or inverted cup-,shaped character and consists `of a toplwalll and acontinuousrsidewall, 'the inlet. vand outlet ducts are: 4formed: in thertop'wall of the housing,

are` disposed .diametrically-- opposite :one another Aand ara separated Eby .a` centrally apertured cross partition, the sump-'lirez` receptacle 'for the oil is connected :to the lowermargin of: thehousing: side wall, the Venturi' tube extends werticaily,l ris centrally idispose'dvwithihtlreinterionof ithehouse ing and has its upper :endlxinfcommunication with thezinnerV endpoi; .theazinlet duct andliits .lower end intcommunicatiurr withrthefhousing* interiori, :and the inner end of,` the outletrductf communicates with the housing interior byway lof an opening; t

tozthe end. thatthevstreamuof fair underrpnessure.

that `is `rnb-passed through the. Venturitube@and` has thefoil in atomized forninadmxe withzit` permitted to flow into the outlet duct for mix-- ture with the. air: under pressure that flows directly 4from theinlet duetto the outlet duct via the aperture in the Acrpss partition.

Another object of the inventionis tofprovide a device Aof the `last mentioned'type and: character infwhich the' lower margin of the housing `side wallfand. the upper endof the sump-like receptaole. are separated by way` of a horizontally extending disc-like: baille plate which is adapted tol `have the oil laden. stream offair under` pressure emanating from'` the lower 'end` of vthe Venturi tube: impinge against it preliminary to nowing through the' opening into the outlet 4duct and hasv marginal slots whereby large droplets of oil are ,permitted toY .iiowi by -gravity back to the'A receptacle.

Anotherrobj'ect of, `the invention is to provide an atomizer variety device ofi the type` and character: underconsideration in which the outlet duct in. the topi-wall of theiinvertedl cupfshaped.

housing` has disposedV therein a spring load-ed valve which normally seats againstv the `centrally apertured: cross partition between thel inner ends of. the inlet `and outlet. ducts and serves auto-- maticfally so to regulate the air `under pressure: that/flows directly from the inlet duct into theoutlet duct and the Lportion of the rair under pressure ythat] flows downwards through the Venturi tube that), regardlessA of variations in `the pressure or rate of flow of air under pressure entering the deviceviathe inlet duct, -theamount of atomized olin the air. under pressure emanat-f ingrrom thev outlet duct is substantially'constant, `A' further yolcfject of the inventiony is to provide ai device of. the lastmentioned character in'lwhich the Venturi tube has associated-with it an adjustable needle valve for controlling the propor tion rof th'e` air underl pressure that is lay-passed through` the Venturi tube..

`A still :further object `of the: invention is to' provide an atomizer varietyjldevice `which isgen-` orally of new'xand improved constructionand not only e'iectivelyl andre'ciently 'fullls its-intended purpose butalso is `oapalc'rle of being produced at aoo'mparatively low cost. l

` Other objects of the invention 'and' the various advantages and" characteristics of the present atomizervariety device willb'e apparent` from a consideration of thefollowing detailed description. v y l The. invention.consists in the several. novel features which are hereinafter setffort-h and are more particularly defined by claims "at` .coni- `clusion hereof.

In the drawing which accompanies and forms a part of this specication or disclosure and in which like numerals of reference denote corresponding parts throughout the several views:

Figure 1 is a plan view of an atomizer variety device embodying the invention;

Figure 2 is a'vertical section taken on the line 2 2 of Figure l and illustratingy in detail the construction, design and arrangement o' parts;

Figure 3 shaped housing, certain portions of the latter being broken away and other vportions `being shown in section in order to illustrate the plug closed opening whereby oil may be introduced into the receptacle; y

Figure s is a horizontal section taken on the line 4 4 oi Figure 2 and showing in detail the is a side view of the inverted cupinternally threaded, circular hole 26. The latter, as shown in Figure 2, is in centered relation with the housing side wall I6. The part of the housing top wall that defines the lower portion of the inner end of the outlet duct I8 has formed therein a circular opening 2l which establishes communication betweenr the upper portion of the chamber 23 and the inner end of the outlet duct.

construction and design of the baille plate between the lower margin of the housing side wall and the upper end of the sump-like receptacle; and` Figure 5 is `a perspective of the valve assembly which is disposed in the outlet duct and consists of a valve, a spiral compression spring and a spring retainer.

The device which is shown in the drawing constitutes the preferred form or embodiment of the invention. It is designed primarily for use in connection with a pipe system between an air compressor or other source of air under pressure and a pneumatic tool and serves, as hereinafter described more in detail, to introduce into the air under pressure in transit through the pipe system atomized oil forlubricating the tool.V The aforementioned pipe system includes a supply pipe t which leads from the compressor or other source of air under pressure, and in addition a discharge pipe 'i which leads to the pneumatic tool.l As its principal componentsor parts the device comprises an inverted cup-shaped housing 8,a sump-likereceptacle 9, a baflie plate Ill, `a Venturi tube il, a suction tube i2, a valve assembly I3, and a needle valve I4. Y

The inverted cup-shaped housing 8 is'disposed between the outlet end of the supply pipe 6 and the inlet end of theV discharge pipe 'l as vshown in Figures 1 and 2. It is preferably in the form of a one-piece metallic casting and consists of a dome shaped top wall l5 and a continuous side wall iii. Thev housing top wall l5 is shaped to form a horizontally extending inlet duct I'I and a horizontally extending outlet duct I8. -These ducts are disposed diametrically opposite one another and have the inner ends thereof separated by a cross partition i9 which is formed as an integral part of the housingtop wall I5 and has a central apertureit for establishing direct communication between the inner ends of the inlet and outlet ducts. The outer end of the inlet duct il has an internal screw thread 2i for connection to an external screw thread on the outlet end of the supply pipe E., .The outer end of the outlet duct i8 is provided with an internal screw thread 22 for connection to an. external screw thread on the inlet end of the discharge pipe l. The continuous side wall I6 of the housing t is formed integrally with, and depends from, the marginal portion of the housing top wall I5 and defines with the'latter a substantially cylindrical chamber 23. The lower end of the housing side wall it is provided with an outwardly and downwardly extending integral flange 24 which denes an internal downwardly facing annular seat 251 The part of the housing top wall I 5'that denes the lower portion of the inner end of the inlet duct il has formed therein an open ended,

The sump-like receptacle 9 is disposed directly beneath the housing 8 of the device and is adapted to contain a body or column of oil. It is preferably formed of molded, transparent plastic material and consists of a circular bottom wall 28 and a continuous upstanding side wall 29. The upper end of the side wall is provided with an integral, outwardly extending ange 30 which underlies the annular seat 25 within the outwardly and downwardly extending flange 2G on the lower end of the housing side wall I6. The receptacle 9 is removably secured to the housing 8 by a ring 3i and an annular series of vertically extending screws 32. The ring extends around the upper end of the receptacle side wall 29 and has the inner margin thereof in underlying relation with the outwardly extending flange 30.

The screws 32 extend upwards through holes in the outer margin of the ring 3l and t within internally threaded sockets 33 iny the iangeL 24 on the lower end of the housing side wall I6. Oil is introduced into the receptacle 9 by way of a filler ppening 34 in the top wall I 5` of the housing 8. This opening is located at one side of the adjoining inner ends of the inlet and outlet ducts I1 and I8 and is normally closed by a screw plug 35. When the latter is removed oil` into theV receptacle 9; After filling of the receptacle-9 to the proper extent the plug 35 is screwed into the opening 34 so as to close the chamber 23. The baille plate I Il is disposed between the lower end of the housing side wall I6 and the.

upper end of the side wall` 29 of the receptacle 9 and has its margin in abutment with the annular seat 25 and clamped in place by the outwardly extending iiange 3D on the upper end of the receptacle side wall 29. It is in the form of a disc and has directly inwards of its clamped margin a pair of Voppositely disposed arcuate slots 36. The latter permit the oil that is introduced into the chamber 23 via the ller opening 34 to flow into the interior of the receptacle 9 in connection with filling of the latter. Preferablya ring shaped gasket 31 is-interposed between the outwardly extending flange 3B., on the upper end i of the receptacle side wall 29 and the margin of the disc-like baiiie plate Ill.

The venturi tube n of the eeviceiextnds.

vertically and is centrally disposed with respect to the depending continuous side Wall It of the housing yil. It is of conventional design or construction and has an externally threaded upper end which lits withinthe circular, internally threaded hole 2G in the housing top wall I5 and communicates withv the inner end of the inlet duct Il.` The lower end'of the Venturi tube II is spaced above the central. portion. of the. baille asians? dev-ice is fuse part vof .the .lair fumier pressure. that-'ils introduced. into the vinlet .duct I'I from' the supply pipe Bfflows directly into the outlet duct |58; yiathe aperture. 2:01 in` the cross partition I9 and rthe balanceor. remainder of the air under pressure `flows downwards through the Venturi tube II and then, after mpinging against the centralportion of the disc-like baillel plate I0, flowsi upwards through the opening 21 into the outlet duct I8 where itmixeszwith thepart of the air that ilows `directly into the outlet duct from the. .inlet duct. The Venturi tube I I,l the chamber 23 `and the opening 21 constitute a closed bypass `between the inlet and. outlet ducts.

`lhesuctiontul'ze .I2 extends upwards from` the bottom :portion ofthe Ainterior of thereceptacle 9 `and leads throughom of the `arcuate slots 36 in the baffle plate I0. The .upper endof Athesuction. tube is disposed within the chamber 23 `.as shown in. `Figure .2. `It .is substantially `semicircular: in shape and extends .into the Venturi tube II at a point a small distance below the restricted lorilice 40 in order that .it is in communication with the upper end of the downwardly flared outlet passage 39. In connection with use ofthe .device the .stream of air under pressure.` that iflows through the Venturi tube creates a suction .effect in connection with passage thereof through `the downwardly flared outlet passage 39 and this, in turn, serves to cause oil tozilow upwards through .the suction tube I2 and then. enter .the downwardly flowing stream in droplet form. .As the drops` of.' oil enter the downwardly flowing stream of' air under pressure they `are fatomizeid. `Atomization of. the droplets is'augmented as the resultvof impingement of the oil laden, downwardly ilowing. stream oi air underpressure `against the central portion of the dise-like baille plate I0. Afterimpinging against the central portion of the baille plate the air under pressure with oil in atomized` form flows upwards through theA chamber 23` and after-passageA through the opening 21 mixeswith the. part of the air vunder pressure that flows directly from the 'inlet duct II into the outlet duct I8.

llnyV large sized drops or globules of oil that accumulate lon, the baffle plate Il! return to the receptacle. interior vla thearcuateslots 36.`

The` valve assembly I3 is disposedin the out-l letduct I8 and serves automatically so toY regulate the air-under pressure that `flows through the housing `8 `that :regardless of variations in the pressure or rate of flow of the air `entering the device via the inletduct the Vamount of atomized-oilin the air emanating from` the outlet duct is substantially constant. It is disclosed in Figures Zand 5` and. consists of' a valve 4I, a spring 42and a. springretaineri43. The valvek 4| is in the `form of a disc 44 and a reduced stem 45 and is` movable horizontally into and out of seated relation with the surface of the cross partition i 19. Athat defines the inner end of the outlet duct I8'. The valve disc 44 embodies in the surface thereof that faces the cross partition lila pluralityof radially extending `grooves 46 which per-` result inquick unseating of the `valve when the pressure of the air in the inlet duct is increased to the point where it issuflicient to overcome the pressure of the spring 42. The latter is a spiral compression spring and extends lengthwiseof the outlet duct JIS'. The'inner end ofthe spring 42 surreundsthestem 45- of the valve 4I- and abuts the:- stern` `is connected to the central portion ofthe valve xdiscu4'41 and extends in the direction of the `outer endigof theoutlet duct. TheA outer end of the spiral compression `spring 42 abuts against the spring.` `retainer `43. The latter is formed of a lengtnof wire, the central portion of which. is bent :into `substantially circular form and the end portions of` whichare bent inwards to form, abutments for the outer end` of Athe spring. The spring `retainer lits within `theinternal screw thread 22 at the outer end of the outlet `duct I8 zand,` due to its construction, `is. contractable so that it may be inserted into place and :also removed'. When the retainer `is vturned inA one direction` it. .feeds inwards `and increases the compression of ithesprng. 42` and when the retaineris turned inthe reverse .direction it feeds outwards and thus results .in a decrease inthe compression ofthe spring. `By adjusting the position of the retainer the compression of the;

The needle valve I4 serves to regulate the proportion of the air under pressure that is bypassed through the Venturitube I I andthus control the amount of atomized oil 'in the air under pressure emanating from the outlet duct I9. It extends` vertically and has a tapered lower end which is disposed within the downwardly tapered inlet passage BintheVenturi tube II. The central portion of the needle valve` I4 extends through a hole 4T in the'central upper portion of theyhousing top wall I5 andalso through 'a packing gland 48. The latter consists oi avertically extending ring shapedV member 49l lon `the `upper centralportion of theihousing top Wall I5;

an annular `rnass 50 of packing material in the lower end of the ring shaped member 49 and a tubular follower 5I inthe `upper end of said member. The follower is connectedto `the mem--` ber49-by a screw thread connection 52 and 'serves'r when tightened to compress the mass 50 around the `central `portion of theneedle valve I4. The upper end of the needle valve is connected to the interiorv of the tubular follower 5I byy a screw thread connection 53 and has a knurledhead 54 at its upper extremity. When the needle `valve is turned in one direction relatively to 'the follower `5I it feeds downwards and thus curtails the amount oi air that is by-passed through the Venturi tube II. Reverse turning of the needle valve results in upward displacement of the tapered lower `end of the valve with rsepeot to `the downwardly tapered inlet passage 38 and thus results in a greater 'proportion of air being bypassed through the Venturi itube. By adjusting the needle valve up or down the proportion of atomized `oil to air may be regulated as desired.

When the device is in useor operation part of the air under pressure thatentersthe housing 8 via the inlet duct I'I flows directly into the outlet duct-l8` and the Vbalance or remainderffof l theai-r flowsdownwards through-theVenturi` tube '.II as`hereinbeioredescribed.` Ihefstream` of air under pressure that flows through the Venturi tube acquires oil in atomized form from the suction tube I2 and after impingement against the central portion of the baffle plate I ilows upwards through the chamber 243 and the opening 2'I into the outlet duct I8 where it admixes with the air under pressure that ows through the aperture 2U and pastthe valve 4I of the valve assembly I3. By raising the needle valve I4 the ratio of atomized oil and air is increased and by lowering the needle valve such ratio is decreased. The oil laden air under pressure emanating from the outlet duct I8 in the housing top wall I5 flows through the discharge pipe 'I to whatever pneumatic tool or other device is at the outlet end of such pipe and `serves to operate and also lubricate such tool or other device. Y

The herein described device effectively and eiliciently fulfills its intended purpose and, due to its construction, mode of operation and arrangement of parts, eiiiciently iullls its intended purpose and is capable of being manufactured or produced at a low cost.

Whereas the device has been described as an instrumentality for introducing oil in atomized form into a stream of air under pressure it is to be understood that it may be used to introduce anyother liquid in atomized or spray form into any gas under pressure. it is also to be understood that the invention is not to be restricted to the details set forth since these may be modied within the scope of the appended claims without departing from the spirit and scope of the invention.

Having thus described the invention what I claim as new and desire to secure by Letters Patent is:

i. A device adapted to introduce liquid in a'tomized form into gas under pressure and comprising an inverted cup-shaped housing embodying a top wall anda continuous side wall depending irom the top wall and forming therewith a chamber, and having its top wall shaped to form a duct for receiving thegas under pressure, an outlet duct, a cross partition between the inner ends of the two ducts and with an aperture there.. in forperrnitting part of the gas under pressure that` enters the inlet duct to ow directly into the 'outlet duct, and an opening establishing communication between the upper portion of the chamber and the inner end of the outlet duct; a receptacle connected removably to, and depending from, the lower end of the housing side wall and adapted to contain a column of liquid to be atomized; a vertically extending Venturi tube disposed in the upper portion of the chamber, having the upper end thereof in communication with the inner end ol? the inlet duct, and adapted to have the remainder of the gas under pressure that enters said inlet duct flow downwards in V'stream form therethrough; an upstanding suction tube having the lower end thereof leading to the bottom portion of the receptacle interior and its upper end extending laterally into the Venturi tube, and adapted in response to downward flow of the stream of gas through the Venturi tube to supply liquid in droplet form from the receptacle into said stream for admixture with, and atomization by, the latter; and a horizontal baffle plate extending across the lower portion of the chamber, clamped between the lower end of the housing side wall and the upper end of the receptacle, spaced a small distance beneath the lower end of the Venturi tube,.and

adapted to have the downwardly flowing stream of gas with the atomized liquid therein impinge against it and then to deect such stream so that it flows upwards through the chamber and.

thence through the opening into the outlet duct for mixture with the gas admitted directly via said aperture.

2. A device adapted to introduce liquid in atomized form into gas under pressure and comprising an inverted cup-shaped housing embodying a top wall and a continuous side wall depending from the top wall and forming therewith a chamber, and having its top wall shaped to form a horizontal duct for receivingthe gas under pressure, a horizontal diametrically opposite outlet duct, an upstanding cross partition between the inner ends of the two ducts and with an aperture therein for permitting part of the gas under pressure that enters the inlet duct to ilow directly into the outletl duct, and avertical opening for establishing communication between the upper portion of the chamber and the inner end of the outlet duct; a receptacle connected to,`and depending irorn, the lower end of the housing side wall and adapted to contain a column of liquid to be atomized; a vertically extending Venturi tube disposed in the upper portion of the chamber, having the upper end thereof in communication with the inner end of the inlet duct, and adapted to have the remainder of the gas under pressure that enters said inlet duct ow downwards in stream form therethrough; an upstanding suction tube having the lower end thereof leading to the bottom portion of the receptacle interior and its upper end extending laterally into the Venturi tube, and adapted in response to downward flow of the stream of gas through the Venturi tube to supply liquid in droplet form from the receptacle into said stream for adinixture with, and atomization by, the latter, and a horizonal baille plate extending completely across the lower end of the housing side wall, spaced a small distance beneath the lower end of the Venturi tube, adapted to have the downwardly iiowing stream of gas with the atomized liquid therein impinge against it and then to deect such stream so that it flows upwards through said chamber and opening into the outlet duct for mixture with the gas admitted directly via said aperture, and having a slot-like opening in its marginal portion for permitting non-atomized liquid droplets that accumulate on the plate to return to the receptacle.

3. A device adapted to introduce liquid in atomized form into gas under pressure and comprising an inverted cup-shaped housing embodying a top wall and a continuous side wall depending from the topwall and forming therewith a chamber, and having its top wall shaped to form a duct for receiving the gas under pressure, an outlet duct, a cross partition between the inner ends of the two ducts and with an aperture therein for permitting part of the gas under pressure that enters the inlet duct to flow directly into the outlet duct, and an opening establishing communication between the upper portion of the chamber and the inner end of the outlet duct; a receptacle connected to, and depending from, the `lower end of the housing side wall and adapted to contain a column of liquid to be atomized; a vertically extending Venturi tube disposed in the upper portion of the chamber, having the upper l end thereof in communication with the inner end of the inlet duct, and adapted to have the remainder-of the gas under pressure that enters amener :said :inlet duct fiow downwardsin stream form therethrough; an upstanding suction tubehaving :theflowerrzend thereof leading to lthe i bottom portion rof the receptacle interior and its` upper end `extending laterally .into the Venturijtube, and

:adapted in response to downward flow .of `the stream of,` gas throughthe Venturi tube to supply liquidtin` dropletform from the receptacle into "said stream for `admixture` with,` and .atomization byi, the latter; a horizontal baille plate extending acrossk 'the' lower portion `oi the chamber, spaced arsmall distance beneath the lower end ofxthe Venturi tube, andadapted to have the downwardlyilowing stream .of gas with the atomized liquid therein irnpinge against it and then to deiiect such stream so that it fiowsupwands through the chamberandthence through the opening into the outlet duct' for. mixture with the gas admitted di- `rectlyvia said aperture and a .springloadedvalve `disposed in the outlet duct,y movable :into and out of seated 'relation with theV `cross partitionand 'operative automatically sol to: controlthewgas, ilow that the ratio of gas flowing directly into thezinlet duct via, the aperturefin the cross partition to the gas that flows downwards through the Venturi tube is substantially constantregardless of variations in the. pressure or rate of ilow of the gas entering the inlet duct.

4. A device y,adapted .to .introduce liquid in atomized form into gas under pressure and comprising an inverted cup-shaped housing embodyinga top wall and a continuous side wall depending from the top wall and forming therewith a chamber, and having its top wall shaped to form la horizontal duct for receiving the gas underv pressure, a horizontal diametrically opposite outlet duct, an upstanding cross partition between the -inner` endswof the two ducts and with an aperture therein for permitting part of the gas under pressure that enters the inlet duct to flow directly into the outlet duct, and a vertical opening for establishing communication between the upper portion of the chamber and the inner end of the outlet duct; a receptacle connected to, and

depending from, the lower end of the housing side wall and adapted to contain a column of liquid to be atomized; a vertically extending Venturi tube disposed in the upper portion of the chamber, having the upper end thereof in communication with the inner end of the inlet duct, y

and adapted to have the remainder of the gas under pressure that enters said inlet duct flow downwards in stream form therethrough; an upstanding suction tube having the lower end thereof leading to the bottom portion of the receptacle against it and then to deilect such stream so that it flows upwards through said chamber and opening into the outlet duct for mixture with the gas admitted directly via said aperture, and having a slot-like opening in its marginal portion for permitting non-atomized liquid droplets that accumulate on the plate to return to the receptacle; and a valve assembly disposed in the outlet duct, operative automatically so to control the gas flew A.that theratio of. gas ilowing directly into the inlet duct via the aperture in the cross partition tothe gas that ilowsdownwards through the Venturi tubevis` substantially constant regardless of variations inthe pressure or rate of the flow of the gas` entering the inletduct, and consisting of avalve movable into and out of seated relation with the cross partition, a` spiral compression spring arranged to urge the valve towards the crossV partition and having one end thereof `in abutment with said valve, and a spring retainer abutting against the other end of the spring and mounted so that it may be 1adjusted to vary the compressionof thespring.

`5.` A device adapted to introduce liquid in atomized form into gas under pressure and comprsing an invertedcup-shaped housing embodyingatop walland ,alcontinuous lside wall depending from` thetopA walland forming therewith a chamber, and having its top wall shaped totform a duct'for receiving thegas under pressure, :anoutletduct, a crosspartition `between the inner ends of the twoducts and with an aperture therein for permitting, partof. they gas under pressure that venterstheinlet duct to flow directly into theoutlet Vductyand an opening establishing communication between the upper portion of the chamber and the inner end .of theoutlet duct; areceptacle connected to, and depending` from, the lower end of the housing side wall and` adaptedfto contain a column of liquid to be atomized; a vertically extending Venturi tube disposed in the upper portion of the chamber, having the upper end thereof in communication with the inner end of the inlet duct, and adapted to have the remainder of the gas under lpressure thatenterssaid inlet duct iiow downwards instream form therethrough; an upstanding suction tube hav-ing the lower end thereof leading to the bottom portion of the receptacle interior and its upper end extending laterally into the Venturi tube, and adapted in response to downward flow of the stream of gas through the Venturi tube to supply liquid in droplet form from the receptacle into said stream for admixture with, and atomization by, the latter; a horizontal baiile plate extending across the lower portion of the chamber, spaced a small distance beneath the lower end of the Venturi tube, and adapted to have the downwardly flowing stream of gas withA the atomized liquid therein impinge against it and then to dei-lect such stream so that it ows upwards through the chamber and thence through the opening into the outlet duct for mixture with the gas admitted directly via said aperture; a spring loaded valve disposed in the outlet duct, movable into and out of seated relation with the cross partition, and operative automatically so to control the gas flow that the ratio of gas flowing directly into the inlet duct via the aperture in the cross partition to the gas that Iiows downwards through the Venturi tube is substantially constant regardless of variations in the pressure or rate of flow of the gas entering the inlet duct; and a vertically extending and `adjustable needle valve extending through the housing top wall, having its lower end disposed in the upper end of the Venturi tube, and adapted in response to adjustment thereof selectively to determine said ratio.

6. A device adapted to introduce liquid in atomized form into gas under pressure and comprising an inverted cup-shaped housing embodying a top wall and a continuous side wall depending from the top wall and forming therewith a chamber, and having its top wall shaped to form a horizontal duct for receiving the gas under pressure, a horizontal diametrically opposite outlet duct, an upstanding cross partition between the inner ends of the two ducts and with an aperture therein for permitting part of the gas under pressure that enters the inlet duct to flow directly into the outlet duct, and a vertical opening for establishing communication between the upper portion of the chamber and the inner end of the outlet duct; a receptacle connected to, and depending from, the lower end of the housing side wall and adapted to contain a column of liquid to be atomized; avertically extending Venturi tube disposed in the upper portion of the chamber, having the upper end thereof in communication with the inner end of the inlet duct, and adapted to have the remainder of the gas under pressure that enters said inlet duct flow downwards in stream form therethrough; an upstanding suction tube having the lower end thereof leading to the bottom portion of the receptacle interior and its upper end extending laterally into the Venturi tube, and adapted in response to downward flow of the stream of gas through the Venturi tube to supply liquid in droplet form from the receptacle into said stream for admixture with, and atomization by, the latter, a horizontal bale plate extending completely acrossthe lower end of the housing side wall, spaced a small distance beneath the lower end of the Venturi tube, adapted to have the downwardly flowing stream of gas with the atomized liquid therein impinge against it and then to deect such stream so that it ows upwards through said chamber and opening into the outlet duct for mixture with the gas admitted directly via said aperture, and having a slot-like opening in its marginal portion for permitting non-atomiaed liquid droplets that accumulate on the plate to return to the receptacle; a valve assembly disposed in the outlet duct, operative automatically so to control the gas flow that the ratio of gas flowing directly into the inlet duct via the aperture in the cross partition to the gas that flows downwards through the Venturi tubel is substantially constant regardless of variations in the pressure or rate of the flow of the gas entering the inlet duct, and consisting of a valve movable into and out of seated relation with the cross partition, a spiral compression spring arranged to urge the valve towards the cross partition'and having one end thereof in abutment with said valve, and a spring retainer abutting against the other end of the spring and mounted so that it may be adjusted to vary the compression of the spring; and a vertically extending and adjustable needle valve extending through the housing top wall, having its lower end disposed in the upper end of the Venturi tube, and adapted in response to adjustment thereof selectively to determine said ratio.

HAROLD J. GOODYER.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS 

